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问题 选择题

下列语句中，不是命题的是（　　）

A．同位角相等，两直线平行

B．画直线AB平行于CD

C．若a2=b2，则a=b

D．同角的余角相等

答案

A、根据同位角相等，判断出两直线平行，是命题，不符合题意；

B、不是判断一件事情的语句，符合题意；

C、根据a2=b2，判断a=b，是命题，不符合题意；

D、根据两个角是同一个角的余角，可判断这两个余角相等，是命题，不符合题意；

故选B．

问答题

细胞培养实验器材的包装要领是什么？（8分）
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单项选择题

One day while a girl was walking in the woods she found two starving songbirds. She took them home and put them in a small (31) . She cared for them and felt great love for them.

Once the (32) and per of the two birds flew from the cage. Therefore, (33) he flew close, she grasped him (34) . She felt glad, but suddenly she felt the bird go limp. She opened her hand and (35) in horror at the dead bird.

She noticed the other bird moving back and forth on the edge of the cage. She could feel his great need for (36) . She lifted him from the cage and (37) him softly into the air. The bird circled once, twice, three times.

The girl watched delightedly at the bird’ s enjoyment. Her heart was no longer (38) with her loss. Suddenly the bird flew closer and (39) softly on her shoulder. It sang the sweetest melody that she had ever heard.

The fastest way to (40) love is to hold on it too tightly, while the best way to keep love is to give it WINGS!

38（）

A.packed 

B.concerned 

C.marked 

D.lined
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